baber/WOPTO huggingface dataset:
Patent GB-1059929-A (GB)
Title: Polyimides
IPC: C08G73/10
Filed: 1964-06-10
Abstract: A method of making a polymer consisting essentially of repeating units of the formula <FORM:1059929/C3/1> where X is hydrogen and Y is hydroxyl, X and Y when taken together represent a carbon-nitrogen valence bond connecting the carbon and nitrogen atoms to which they are attached, and R is a divalent aromatic radical, the amino groups thereof being attached to non-adjacent carbon atoms comprises reacting 3:31:4:41-benzophenone tetracarboxylic acid or a derivative thereof with a diamine of the formula H2N-R-NH2, where R is a divalent aromatic radical; the amino groups thereof being attached to non-adjacent carbon atoms, to form an intermediate polyamide-acid and curing said intermediate polymer.  Specified diamines are m- and p-phenylene diamine, 2:4- and 2:5-toluene diamine, 2:5-diaminochlorobenzene, 2:4-diaminoanisole, 1:4 - diaminonaphthalene, oxydianiline, diaminodiphenyl sulphone, diaminophenyl methane, 4:41-propylidene dianiline, thiodianiline and mixtures thereof.ALSO:Copper or aluminium wires or plates are coated with solutions of polyamide acids derived from 3:3':4:4'-benzophenone tetracarboxylic acid or a derivative thereof and a diamine of the formula H2N-R-NH2 where R is a divalent aromatic acid, the polymer being cured to polyimide by the application of heat.
Patent GB-1520334-A (GB)
Title: Synchronising circuit arrangements
IPC: H04J3/06
Filed: 1976-06-11
Abstract: 1520334 APC systems SIEMENS AG 11 June 1976 [25 July 1975] 24187/76 Heading H3A A synchronizing arrangement with reduced pull-in time and increased pull-in range and suitable for the mutual synchronization of oscillators in a telecommunications network or for the compensation of differences in bit frequency between signals arriving at a node of the network comprises a phase discriminator PD responsive to an externally supplied pulse train and the pulse train from a controlled oscillator O to produce an error signal, an arrangement GK for determining each overshooting and undershooting of q#n phase difference where q is a positive constant and n = 0, Œ1, Œ2. . . ŒN, a counter BZ with a maximum count of N for recording the absolute value of n, and an arrangement GU, GO or controlling the phase discriminator PD as to maintain its output in a state corresponding to a phase difference of Œq#. The pulse trains may be applied via respective frequency reducers ZL 1 , ZL 2 , ZO 1 , ZO 2 . A plurality of phase discriminators, each responsive to one of a plurality of input pulse trains and the oscillator O ouput may be provided with the output of the discriminators combined in a summing or mean-value forming element (not shown) before application to the oscillator O. The comparator GK detects coincidence between every fourth period (for a division by 4 at ZL 1 , ZL 2 ) the input pulse train with the oscillator output train to indicate overshooting and undershooting of a 2#n phase difference and its outputs at g, h are applied via a 1 bit store YZ to an up-down counter BZ having a maximum count of N. A pulse suppression circuit OO suppresses each counting pulse corresponding to a zero phase difference. The output of counter BZ controls the phase discriminator at inputs O, U.
Patent GB-282894-A (GB)
Title: Process for obtaining photographic images
IPC: G03C1/58
Filed: 1926-09-30
Abstract: 282,894. Gay, E. Sept. 30, 1926. Diazotype processes.-A process of producing photographic images involving the formation of azo dyes by reaction of diazo bodies sensitive to light upon phenols, naphthols, or amines in the presence of alkali employs in the sensitive layer light-sensitive diazo bodies derived from anisidines or naphthanisidines, such bodies comprising alkyl ethers of orthoaminophenol and orthoaminonaphthols or their nuclear substitution products. Diazo derivatives of paracresidine, aminohydroquinonedimethyl ether, 2-amino-1-4- dimethoxynaphthalene, orthoanisidine, chloranisidine, sulphonic anisidine. dianisidine, and orthophenetidine, or the halogen, carboxyl, nitrated or sulphonated derivatives thereof are mentioned as suitable diazo bodies. In one example. a. sheet of paper is soaked in a bath of diazohydroquinonedimethyl ether, the preparation of which is described, dried, exposed to light under a design, and developed to a violet colour in a bath containing aminonaphtholdisulphonier acid H and sodium carbonate. In other examples (1) the diazo derivative of orthoanisidine mixed with gum arabic is employed, and the image is developed to an orange-brown colour in a bath containing metatoluylenediamine. and sodium carbonate ; (2) the diazo derivative of orthophenetidine is employed in a gelatin layer, and the image is developed to a deep brown colour in a bath containing phloroglucine and slaked lime: (3) the diazo derivative of paracresidine is employed, and the image is developed to a purplebrown colour in a bath containing 7-amino-1- naphthol-3 : 6-disulphonic acid and ammonia.
Patent GB-615850-A (GB)
Title: Improvements relating to cork screws
IPC: B67B7/44
Filed: 1946-08-15
Abstract: 615,850. Corkscrews &c. LEWIS SPRING CO., Ltd., and CHATWIN, T. G. Aug. 15, 1946, No. 24257. [Class 125 (ii)] ' To a plate alpha carrying a corkscrew b, are pivotally attached two channel - shaped members c which, in one position, project beyond the point to protect the pocket &c. of the user, and in the other position, when turned upwardly to engage the edges of the plate alpha, provide rings for the manipulation of the screw. A crowncork removing device a<4> may also be provided.
Patent GB-1411241-A (GB)
Title: Hairpieces
IPC: A41G3/00
Filed: 1972-05-24
Abstract: 1411241 Hairpieces J C FORBES 22 Aug 1973 [24 May 1972] 24378/72 Heading A4V  A method of making a hairpiece comprises the embedding of the root ends of groups of hairs in a layer of liquid or semi-liquid plastics material shaped to conform to a scalp region, the plastics material subsequently setting to form a flexible film with embedded groups of hair ends. The plastics material may be an elastomeric material e.g. a block co-polymer of styrene and butadiene which is advantageously a thermo-setting plastics to allow of softening by heat for manipulation. A solution of plastics may be applied to a non-stick surface and the solvent allowed to evaporate or it may be applied to the wearers scalp for moulding. Hairs are inserted in bunches by hand or in large quantities simultaneously using a jig. A hairpiece may be made in sections for subsequent joining by welding or by an adhesive. An elastic fixing means is disclosed whereby the hairpiece is attached by elastic anchoring strips, which may be extensions of the hairpiece foundation, wound round clumps of live hair and secured there by wire or spring clips.
Patent GB-1603604-A (GB)
Title: Soil cultivating machines
IPC: A01B33/08
Filed: 1978-05-30
Abstract: Earth cultivating machine comprising a chassis supporting a plurality of rotating cultivating elements driven by a power take-off from a tractor about upwardly-directed axes, these elements being arranged side by side in a row perpendicular to the direction of advance of the machine and cultivating overlapping strips of earth, the machine being provided with a protective element arranged at the front of the hollow chassis, across the full width of this chassis. The protective member 29, 72 has a U-shaped transverse cross section, the upper leg of the said protective member being fixed by bolts 21 to the said chassis. <IMAGE>
Patent GB-1121715-A (GB)
Title: Improvements relating to shore gangways
IPC: E01D15/24
Filed: 1966-06-01
Abstract: 1,121,715. Gangways. A. M. THOMSON. 24 May, 1967 [1 June, 1966], No. 24395/66. Heading B7J. A ship-to-shore gangway structure comprises an upper gangway 1 pivotally attachable to the ship 33 and having wheels at its lower end which thereby is movable (as the ship rises and falls) along a raisable platform 3, and a lower gangway 2 pivoted to the platform (or to a turntable thereon) and having wheels at its lower end which thereby is movable (as the platform 3 is raised or lowered) on the jetty 14. The platform 3 is guided by rollers between beams 9 carried by a wheeled frame 10 running on rails 13 set in the jetty 14, and is raised by a manual rack-and-pinion jack, or hydraulically, or cables wound on to motor-driven drums.
Patent GB-933040-A (GB)
Title: A press tool for use in punching holes
Inventor: STEPHENS JOHN LONDON
IPC: B21D28/24
Filed: 1961-07-06
Abstract: 933,040. Punches. E.M.B. CO. Ltd. May 28, 1962 [July 6, 1961], No. 24435/61. Class 83 (4). A press tool comprises a housing and a punch holder mounted for limited sliding movement therein, resilient means between the housing and the punch holder which urge the punch holder to a position in which a punch supported thereby projects to a maximum extent from the housing, and releasable catch means for retaining the punch holder in a position in which the punch projects to a minimum extent from the housing, arranged so that when the catch is released the punch engages the work material to enable it to be correctly located beneath the punch, and the catch is operated on actuation of the press to lift the punch from the material on the return stroke of the press. The housing 10 is secured in the press ram and has a bore 11 in which slides a punch holder 14. A compression spring 19 urges the holder downwards in the housing. A spring-pressed key 20 is mounted in the stem of the punch holder, and when the holder is in its uppermost position the key enters a recess 22 in the housing. A manually operated cam 23 forces the key back against the springs 21 when it is desired to release the punch. The upward movement of the punch holder is limited by the engagement of the shoulder 17 with the shoulder 13, and the downward movement by a flange 18 on the punch holder. The cam 23 also has a lip which engages the flange 18 so that the punch holder can be raised slightly against the spring 19. A punch 25 is clamped in the holder by a screw 27, and there is a stripper 28 secured to a member 29 which is attached to a stationary part of the press. A die 32 is mounted in a holder 31. Both the punch and die may be keyed to prevent rotation. Operation.-With the punch-holder in the lowest position the work material is positioned under the punch, the cam 23 being operated if necessary to relieve the pressure of the punch on the material. When the press is actuated the spring 19 is first compressed and then the punch-holder and housing move together and cause the punch to penetrate the work. At the same time the key 20 enters the recess so that on the return stroke of the press the punch is raised above the stripper 28. In a modification the stripper is resiliently connected to the housing. A manually operable die ejector may also be provided and comprises a lever operated tubular member mounted under the die.
Patent GB-490720-A (GB)
Title: Improvements relating to flexible floor coverings
IPC: B27M3/04
Filed: 1937-09-08
Abstract: 490,720. Composite blocks. ELMENDORF, A. Sept. 8, 1937, No. 24472. [Class 145 (ii)] [Also in Group X] A floor covering comprises a plurality of panels each in the form. of a plurality of thin and narrow wood strips 2 lying close together on, and glued to, a felt or other flexible backing 1, and means are provided at the meeting edges of the panels for holding them together and preventing relative movement of the panels transversely of the plane of the covering. The wood strips 2, which are glued to the backing 1, but not to each other, are produced from a thin board by cutting or sawing the board along parallel longitudinal lines so as to produce strips which are either completely separated from each other as shown in Fig. 2, or are held together by thin strands 12, as shown in Fig. 5. The depth of the strips may be from <5>/16 inch to # inch and the width about # inch. The panels shown in Fig. 2 are provided with end grooves 3 for the reception of tongues 6 on wood spacing strips 4, 5 which are either made long, as shown at 4, or in a series of short pieces, as shown at 5. In the modification shown in Fig. 4, the spacing strips are dispensed with, and adjacent panels interengage by means of tongues 3 and grooves 8, and, in this case, the flooring may also be glued or cemented to the sub-floor. Glue may be used in the joints between the panels.
Patent GB-654355-A (GB)
Title: Improvements in frequency changing arrangements for radio transmitters
IPC: H03B21/04
Filed: 1946-08-16
Abstract: 654,355. Radio transmitting apparatus. SOC. FRANCAISE DES TELECOMIMUNI. CATIONS. Aug. 16, 1946, No. 24485. Con. vention date, Jan. 21. [A Specification was laid open to inspection under Sect. 91 of the Acts, Aug. 16, 1946.] [Class 40 (vi)] In a system for generating oscillations having any frequency in a broad continuous band, the oscillations are provided by mixing on the one hand a harmonic selected among a plurality of the harmonics of the basic frequency of a crystal which are distributed over the broad frequency band, and on the other hand oscillations provided by an oscillator of low frequency continuously adjustable over a narrow range, characterized in that with the lowfrequency oscillations are mixed oscillations of a stable high frequency before being mixed with the selected harmonic. An oscillator 51 is continuously variable over a range 200- 300 kc. and its output is mixed with oscillations of 1000 kc. from a piezoelectric oscillator 53 in a balanced mixer 56 to give continuously variable oscillations having a range of 1200- 1300 kc. selected by a tunable filter 57. Oscillator 53 also feeds a harmonic generator 58 and filler 59 to supply harmonics of value 6,000, 7,000 ... 10,000 kc. which are mixed at 60 with the output of filter 59 to give five bands at 1,000 kc. intervals and each continuously variable over a range of 100 kc., viz. 4700-4800 kc ; 5700-5800 kc ; ... 8700- 8800 kc. These bands are selected by a five step band-pass filter 65 and fed to a mixer 66 which is fed with harmonics of value 800, 900 ... 1700 kc. from an oscillator 61 of basic frequency 100 kc. synchronized by oscillator 53. The resulting output comprises frequencies in the continuous range 3000-8000 kc. A valve circuit corresponding to the above arrangement is described, (Fig. 2, not shown). Specification 647,643 is referred to.
Patent GB-918705-A (GB)
Title: Improvements in or relating to mechanisms for simulating the movement of vehicles
IPC: G09B9/14
Filed: 1960-07-13
Abstract: 918,705. Airmen's harness and clothing. HELMORE, W. July 13, 1961 [July 13, 1960; May 11, 1961], Nos. 24491/60 and 17296/61. Class 141. [Also in Group XXXIII] The harness or clothing worn by a trainee aircraft pilot is adapted to apply movement or pressure to the trainee's body as he sits in a chair manipulating dummy controls, to simulate the movements and pressures which would occur in flight. In Fig. 4, the harness comprises a yoke 29 placed on the shoulders, shoulder straps 10, 11, lap straps 12, 13, and a common strap fastener 20. The yoke has an inflatable lining 48, and the straps and fastener have inflatable pads 46, 47, and 43, which can be connected to a source of fluid under pressure to apply pressure to the pilot's shoulders, sides, and abdomen. In Fig. 5, a suit worn inside a conventional harness has inflatable pads 59, 60, 61, 62 and 64, so that a force can be applied to the pilot's body in any direction. In other embodiments, a conventional harness is attached not to the chair, but to cables controlled by a servomechanism so that the pilot's body can be pulled in various directions. Alternatively, the harness may be anchored to fixed structure, and the seat moved, to give the pilot the illusion of flight-generated forces.
Patent GB-807154-A (GB)
Title: Improvements in and relating to arc chutes for electric circuit breakers
Inventor: STOBART LESLIE WALLACE
IPC: H01H9/34
Filed: 1954-08-24
Abstract: 807,154. Arc - rupturing in switches. ENGLISH ELECTRIC CO. Ltd. Aug. 19, 1955 [Aug. 24, 1954], No. 24581/54. Class 38 (5). In an arc-chute having spaced slotted plates 10 partly or wholly of insulating heat-resisting material, the plates are spaced by ribs 10a integral with the plates. The ribs and the abutting parts of the plates may be formed with co-operating projections 15 and hollows respectively. The plates may have alternately directed oblique V-shaped slots; the ribs 10a strengthening the legs defining the slots. The plates 10 are supported by side-plates 11 and end-plates 12 and may be held together by cement or by being placed in compression by shims 13 inserted between one end-plate 12 and a further end-plate 14 which joins the side walls 11. The plates may be wholly of ceramic material or may have an insert of magnetic material. Reference has been directed by the Comptroller to Specifications 791,613 and 791,614.
Patent GB-218166-A (GB)
Title: Improvements in or relating to coupling, fastening or like devices
IPC: H01R13/18
Filed: 1923-10-04
Abstract: 218,166. Bennion, C. F. Oct. 4, 1923. Shaft couplings; universal joints. - In a plug-and-socket connection for rods &c. the two members adapted to be readily engaged by relative axial movement, are held together by the yielding gripping action of resilient material compressed between the parts, which action is localized at separate zones spaced well apart axially of the coupling and is independent at the separate zones. As shown in Fig. 2, the soclcet 3 is provided with a rubber &c. lining 5 and two groups of three studs 7, 9, which are held in a thin sheet metal holder 11 gashed in a number of places 13 and positioned between said lining 5 and the plug member 15. If desired a bayonet joint connection may be made between interrupted threads on the plug member 15 and the studs 7, 9, while the lining may be divided into separate portions held in position behind the studs by shoulders formed on the holder 11. The invention is said to be applicable to shafts transmitting power. Specifications 155,717 and 167,932, [both in Class 38 (i), Electric couplings &c.], are referred to.
Patent GB-878289-A (GB)
Title: Improvements in direct-coupled transistor amplifiers
IPC: H03F1/30
Filed: 1960-07-15
Abstract: 878,289. Transistor amplifying circuits. STANDARD TELEPHONES & CABLES Ltd. July 15, 1960 [July 22, 1959], No. 24682/60. Class 40(6) A direct-coupled transistor amplifier comprises a bridge circuit having three arms comprising resistors Rl, R2, R3 respectively and a fourth comprising two non-linear resistive devices Znl, n2 in series. The non-linear resistive devices are preferably Zener diodes. The input is applied at terminals 1, 2, to one diagonal of the bridge, and a first transistor Tr1 has its input connected across the other diagonal. The output current of the first transistor Trl flows through resistor R4. A second transistor Tr2 has its input connected across the diagonal of a bridge formed by Zener diodes Znl, Zn2, the emitter-collector path of transistor Tr1, and resistor R4. The amplified output is taken across a resistor R5 in the collector circuit of the second transistor Tr2. The arrangement may be used in a voltage regulating circuit with a series-connected transistor as the regulating element.
Patent GB-1536340-A (GB)
Title: Transducer
IPC: G01B11/16
Filed: 1976-06-15
Abstract: 1536340 Photo-electric measurement of force STANDARD TELEPHONES & CABLES Ltd 14 June 1977 [15 June 1976] 24685/76 Heading G1A [Also in Division G2] A flexible (glass) body includes a buried optical guiding region and has grooves in a major surface such that flexure of the body produces a strain pattern across the guiding region with a pitch suitable for diffracting guided light out of the region. In a strain or pressure sensor, or microphone, a photodetector measures the intensity of the guided or diffracted light.
Patent GB-1346547-A (GB)
Title: Device for recovering a clock signal from a digital signal
IPC: H04L7/027
Filed: 1972-05-26
Abstract: 1346547 Digital transmission; clock pulse recovery PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 26 May 1972 [29 May 1971] 25015/72 Heading H4P A clock pulse recovery circuit derives an harmonic, particularly the second, of input signal transition frequency which is fed to a unit blocking one of two successive signals occurring within one timing unit, and further includes a resonant circuit automatically tuned to the harmonic frequency. The blocking unit preferably comprises a monostable circuit having an upset time between half and one timing unit. In Fig. 2 (not shown) signal source (A) feeds through transition detector (B) a monostable circuit (D) blocking signals occurring within 0À5-1 time units of setting signals, the output passing through a filter (C) tuned by (K), (D, E, K) forming the embodiment shown in Fig. 4 in greater detail. Full wave rectifier T has an output of double input frequency any pulses of which occurring during the upset time of monostable S being blocked, the remainder traversing a low pass filter Q and amplifier G to a second full wave rectifier H the dominant output frequency of which is the second harmonic of the clock frequency which is fed to a filter circuit formed by Cl, J1 having an output terminal F. At resonance voltage across J1 is at 90 degree displacement with respect to that across R1 such displacement varying with changes in input signal frequency. The circuit is tuned to resonance by a capacitor C1 which is fed with a bias voltage through decoupling arrangement R3, R4, C2. R1, R2 form a potential divider hence voltage across series circuit C1, J1 is higher in a non resonant condition. A secondary winding J2 through amplifier V and phase shifter L induces opposed voltages in transformer windings M2, M3 which are fed across a bridge network D1, D2, C4, C5, R5, R6 also receiving a voltage from transformer I across a diagonal. If the filter circuit is detuned with respect to the input signal, voltages across C4, C5 are unequal which difference varies the bias on C1 through low pass filter N which prevents undesired H.F. feedback, the varying bias bringing the filter circuit back into resonance. An inductance may be varied instead of a capacitor and components Q, H may be omitted if the clock pulse is regular.